Source for: https://cirosantilli.com and https://ourbigbook.com/cirosantilli Build HTML with https://github.com/ourbigbook/ourbigbook with "npm install && npx ourbigbook ." You can use this issue tracker for anything you want to tell me, even if it is not related to the repo. I also use this repo as generic issue tracker for myself.
Doesn't even need to be for money, just to help with national security.
https://www.quora.com/How-do-I-report-zero-day-vulnerabilities-to-the-NSA
The MI5 has a clear contact form: https://www.mi5.gov.uk/contact-us but they are internal matters only.
The MI6 also has one: https://www.sis.gov.uk/share-information-securely.html but they are mostly HUMINT, SIGINT is on the GCHQ.